Retrieves an account using the loyalty account ID.
The getAccount() function returns a Promise that resolves to the specified loyalty account when it is retrieved.
You can also get an account using a secondary ID, such as a contact ID or a member ID with the getAccountBySecondaryId() function.
Note: Only visitors with Manage Loyalty permissions can retrieve a loyalty account.
You can only call this method when authenticated as a Wix app or Wix user identity.
ID of the account to retrieve.